Started earlier, now it wont - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 7 (permalink) Old 07-23-2017, 05:08 AM Thread Starter
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Exclamation Started earlier, now it wont

Hello again guys.

Well today has been a long day of fixing up the bike. Earlier in the day it started up as it usually does, full choke then hit the starter and it struggles a bit but if I blip the throttle it usually started right up. Except now after completely flushing the coolant I wanted to start my bike up to test it out annndddd....nothing. It cranks and cranks but does not fire. I'v had a couple backfires (which scared the hell out of me) and I am starting to think I flooded the engine. So i did the typical procedure to unflood the engine, no choke full throttle and hit start for 5 seconds. Did that, tried to start normally again (full choke, blip the throttle while starting). nothing. Just cranks and cranks. my battery has died atleast 6 times while trying to get it to start the past 4 hours. I think it might be because I messed with the idle control knob. The previous owner told me that if the knob is not in the correct position, the bike will not start. the knob has absolutely no indications of where a default position could be (nice one kawasaki) so im left here having no clue what it is set at and im getting really pissed off and frustrated. I have the battery on a charger right now and will try again in the morning.

Hayden
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post #2 of 7 (permalink) Old 07-23-2017, 08:52 AM
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If you crank the idle knob clockwise the whole way that will put it to the highest idle position. You can turn it down after that to where it needs to be.

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post #3 of 7 (permalink) Old 07-23-2017, 11:38 AM
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Sounds like your battery is no good...or not fully charged... I think you can't recharge a battery 6 times in 4 hours.?

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post #4 of 7 (permalink) Old 07-23-2017, 01:03 PM
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Agree with KM on the battery. Low cranking voltage leads to backfire too.

Mine backfires anytime I open the throttle on startup.
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post #5 of 7 (permalink) Old 07-23-2017, 06:21 PM
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backfire indicates low voltage as mentioned. These bikes are completely controlled by electricity. So many indirect problems result from low voltage that on any other bike would probably be a carb issue. On the VN, damn near everything goes back to the voltage issue.

Now, on that note....... it's probably your regulator plug. They tend to blacken the plug spades over time and that leads to issues like this.

AFTER you do the regulator plug and it's back perfect and pretty, look into the pickup mod to make your bike start on the first rotation every time.


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post #6 of 7 (permalink) Old 07-24-2017, 01:04 AM Thread Starter
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Okay guys I got it all sorted out, it was because the battery was low but after letting it charge all night, it fired up no problem. Thanks for all the replies.
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post #7 of 7 (permalink) Old 07-24-2017, 02:11 AM
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Yeah it's not sorted. Reread my post and do it or you'll be back in two days saying your bike won't start. UNLESS it's s the one you can't ride. Then makes perfect sense it was dead.


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